Percentage of observations where the VFR minimums for ceiling and visibility are met: visibility of 8 km or more and a ceiling of 3,000 ft or more. Only observations between sunrise and sunset are taken into account.
Marginal VFR conditions (%)
Month
Average
2024
2023
2022
2021
2020
January
79.0
65
88
80
77
92
February
73.8
80
82
73
59
85
March
74.2
71
62
81
74
78
April
80.8
87
89
75
81
79
May
92.4
84
94
86
90
94
June
98.1
96
97
99
96
99
July
98.4
100
99
96
100
100
August
98.5
97
97
100
100
99
September
97.4
97
98
98
95
99
October
92.0
89
89
90
90
97
November
86.5
92
89
78
78
December
72.0
78
46
84
56
Average
88.1
87.2
89.4
86.6
86.3
88.8
Marginal VFR conditions or better during daylight period
Percentage of observations where the MVFR minimums for ceiling and visibility are met: visibility of 5 km or more and a ceiling of 1,000 ft or more. Only observations between sunrise and sunset are taken into account.
Maximum temperatures (°C)
Month
Average
2024
2023
2022
2021
2020
January
13.3
14
12
14
14
13
February
14.1
15
15
15
15
16
March
17.5
17
20
16
17
17
April
21.9
24
24
23
25
19
May
29.0
29
29
26
30
29
June
34.0
35
32
35
35
34
July
34.6
34
34
34
35
35
August
34.7
34
36
36
37
31
September
31.5
31
31
33
31
32
October
25.5
25
26
27
23
26
November
19.0
23
20
18
17
December
15.0
17
13
17
12
Average
24.4
25.6
25.1
24.7
24.8
23.3
Average highest temperature per day
The maximum temperature is typically observed some hours after noon.
Minimum temperatures (°C)
Month
Average
2024
2023
2022
2021
2020
January
1.3
4
-2
1
1
1
February
2.6
2
2
3
2
3
March
6.2
5
8
6
5
7
April
9.8
10
10
11
11
9
May
15.0
15
16
14
16
14
June
20.6
21
21
20
21
20
July
23.8
24
24
23
25
23
August
22.7
23
23
22
24
21
September
19.3
20
18
20
21
18
October
12.9
13
14
16
12
11
November
7.2
9
8
6
7
December
3.6
4
4
3
2
Average
12.3
13.6
12.2
12.5
12.2
11.3
Average lowest temperature per day
The minimum temperature is typically observed just before sunrise.
Precipitation (%)
Month
Average
2024
2023
2022
2021
2020
January
7.6
8
2
13
5
6
February
11.7
20
8
7
6
13
March
7.9
4
7
5
9
15
April
7.8
6
3
7
3
17
May
4.0
4
8
11
4
3
June
1.4
1
6
0
1
2
July
2.0
1
2
2
2
4
August
1.4
2
0
1
1
4
September
2.0
2
1
4
4
3
October
5.4
5
8
3
6
7
November
5.1
2
2
5
11
December
4.7
6
6
2
7
Average
4.8
4.8
4.3
4.9
3.7
7.3
Precipitation during daylight period
Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.
Wind speed (knots)
Month
Average
2024
2023
2022
2021
2020
January
4.7
4
4
5
4
4
February
5.1
4
6
4
5
6
March
6.0
5
6
6
6
5
April
5.7
6
6
5
6
5
May
6.8
7
7
7
6
6
June
8.2
8
8
8
7
8
July
7.6
7
7
8
7
8
August
7.0
6
7
7
6
7
September
6.0
6
6
5
7
5
October
4.3
4
5
5
5
3
November
3.8
5
4
3
3
December
3.7
4
2
4
3
Average
6.0
5.8
6.0
5.8
5.6
5.5
Average wind speed
Excluding wind gusts. Only observations between sunrise and sunset are taken into account.
Prevailing wind direction
Month
2024
2023
2022
2021
2020
January
115°
329°
260°
276°
322°
February
262°
276°
286°
305°
288°
March
253°
263°
265°
265°
262°
April
261°
255°
262°
265°
267°
May
248°
253°
253°
259°
249°
June
267°
262°
265°
261°
249°
July
258°
255°
261°
253°
243°
August
254°
256°
253°
254°
236°
September
265°
266°
263°
255°
251°
October
259°
265°
271°
259°
271°
November
238°
313°
277°
316°
December
069°
357°
274°
291°
Prevailing wind direction
Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.